package com.yupi.springbootinit.judge;

import cn.hutool.json.JSONUtil;
import com.yupi.springbootinit.common.ErrorCode;
import com.yupi.springbootinit.exception.BusinessException;
import com.yupi.springbootinit.judge.codesanbox.CodeSanBox;
import com.yupi.springbootinit.judge.codesanbox.CodeSandBoxProxy;
import com.yupi.springbootinit.judge.codesanbox.model.CodeSanBoxFactory;
import com.yupi.springbootinit.judge.codesanbox.model.ExecuteCondeRequest;
import com.yupi.springbootinit.judge.codesanbox.model.ExecuteCondeResponse;
import com.yupi.springbootinit.judge.strategy.JudgeContext;
import com.yupi.springbootinit.model.dto.question.JudgeCase;
import com.yupi.springbootinit.judge.codesanbox.model.JudgeInfo;
import com.yupi.springbootinit.model.entity.Question;
import com.yupi.springbootinit.model.entity.QuestionSubmit;
import com.yupi.springbootinit.model.enums.QuestionSubmitStatusEnum;
import com.yupi.springbootinit.service.QuestionService;
import com.yupi.springbootinit.service.QuestionSubmitService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class JudgeServiceImpl implements JudgeService {

    @Resource
    private QuestionService questionService;

    @Resource
    private QuestionSubmitService questionSubmitService;

    @Resource
    private JudgeManger judgeManger;

    @Value("${codesandbox.type:example}")
    private String type;

    @Override
    public QuestionSubmit doJudge(long questionSubmitId) {
//        1）传入题目的提交 id，获取到对应的题目、提交信息（包含代码、编程语言等）
        QuestionSubmit questionSubmit = questionSubmitService.getById(questionSubmitId);
        if (questionSubmit == null) {
            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR, "提交信息不存在");
        }
        Long questionId = questionSubmit.getQuestionId();
        Question question = questionService.getById(questionId);
        if (question == null) {
            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR, "题目不存在");
        }
//        2）如果题目提交状态不为等待中，就不用重复执行了
        if (!questionSubmit.getStatus().equals(QuestionSubmitStatusEnum.WAITING.getValue())) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR, "题目正在判题中");
        }
//      3)更改判题（题目提交）的状态（判题中），防止重复提交
        QuestionSubmit questionSubmitUpdate = new QuestionSubmit();
        questionSubmitUpdate.setId(questionId);
        questionSubmitUpdate.setStatus(QuestionSubmitStatusEnum.RUNNING.getValue());

        boolean update = questionSubmitService.updateById(questionSubmitUpdate);
        if (!update) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "题目状态更新错误");
        }
//        3）调用沙箱，获取到执行结果

        CodeSanBox codeSanBox = CodeSanBoxFactory.newInstance(type);
        codeSanBox = new CodeSandBoxProxy(codeSanBox);
        String language = questionSubmit.getLanguage();
        String code = questionSubmit.getCode();
//      获取输入用例
        String judgeCaseStr = question.getJudgeCase();
        List<JudgeCase> judgeCaseList = JSONUtil.toList(judgeCaseStr, JudgeCase.class);

        List<String> inputList = judgeCaseList.stream().map(JudgeCase::getInput).collect(Collectors.toList());
        ExecuteCondeRequest executeCondeRequest = ExecuteCondeRequest.builder()
                .code(code)
                .language(language)
                .inputList(inputList).build();
        ExecuteCondeResponse executeCondeResponse = codeSanBox.executeCode(executeCondeRequest);
        List<String> outputList = executeCondeResponse.getOutputList();
        //5）根据沙箱的执行结果，设置题目的判题状态和信息

        JudgeContext judgeContext = new JudgeContext();
        judgeContext.setJudgeInfo(executeCondeResponse.getJudgeInfo());
        judgeContext.setInputList(inputList);
        judgeContext.setOutputList(outputList);
        judgeContext.setJudgeCaseList(judgeCaseList);
        judgeContext.setQuestion(question);
        judgeContext.setQuestionSubmit(questionSubmit);
        JudgeInfo judgeInfo = judgeManger.doJudge(judgeContext);
        //6)修改数据库中的判题结果
        questionSubmitUpdate.setId(questionId);
        questionSubmitUpdate.setStatus(QuestionSubmitStatusEnum.SUCCEED.getValue());
        questionSubmitUpdate.setJudgeInfo(JSONUtil.toJsonStr(judgeInfo));
        update = questionSubmitService.updateById(questionSubmitUpdate);
        if (!update) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "题目状态更新错误");
        }
        QuestionSubmit questionSubmitResult = questionSubmitService.getById(questionId);
        return questionSubmitResult;
    }
}
